I have tiger tail that split in half, it went into hiding for a couple weeks, just before I had to tear down my tank to move. when I pulled all the rock I found two. they were about 3"-4" long. Im guessing when it split it was about 12" not stretching, 18" stretching out. one of my two seems to be growing faster than the other, its probably 8" now and the other is only 5". they are fun to watch and they do great on the sand and in the rocks.